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700whp Cams & Turbo's For Built 26/30

shanef

By shanef,
in Engines & Forced Induction

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shanef Grand Master

shanef

Posted
Posted

Hi all,

I'm just after some opinions of what turbo's (read low mounts that bolt to stock manifolds) would be best for me. My motor is freshly built with all the good stuff, and just in the process of getting the head ported and installing some cams (still undecided, need suggestions as to what would work best)

I want 700awhp @ 2bar max and i was thinking either the HKS GT-RS or Trust T618Z, redline is set at 7500. What are peoples experiences with these turbo's, and what are their characterisitics i.e when do they come onto boost, how much can they flow @ what boost etc. Also the car's being set-up for track & hill climbs, so i require half decent response.

It'd be ideal if someone could suggest what turbo and cam combo will be best for my motor and power goal.

cheers

Shane

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paulr33 Grand Master

paulr33

Posted
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either are a really big twin combo, i hope you dont expect them to come on anytime soon. do a search for twin GT-RS's i think 600HP has them and i think OZGTR97V tried them as well (said too big for 2.6, more like 2.8 stroker).

twin 2530s will give you good response and and really good midrange, plently for hill climbs etc. 700awhp is silly for hillclimbs. for hillclimbs boost repsonse is very very important, running large twin trust's or gt-rs's isn't going to cut it, far too laggy.

i would suggest focusing more on midrange and average power

paulr33 Grand Master

paulr33

Posted
Posted

yeah i saw the 3 litre later on. see if you can find out what a/r the gt-rs's are and aim a tiny bit lower than that perhaps? you should defintely do the split dumps/fronts (trust ones i think are the bee's knee's) and ensure a big exhaust from the cats back

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Its GT-RS... and i remember you saying a while back you refused to pay the HKS pricetag... so...

Not sure how your gonna get yourself outta that McPickle.

I got ya on that one :)

But yeah, its GT-RS's for you Shane. There really isnt an option.

Even with a 26/30, over 500rwkw is not going to be your friend for hillclimbs ;)

Track, it should be alright, but you've still got another 20k to spend on brakes and suspension to get the power to the ground :P

Your basically trying to do what the Racepace GTR has done IMO, and that is a 6 figure car

shanef Grand Master

shanef

Posted
  • Author
Posted
yeah i saw the 3 litre later on. see if you can find out what a/r the gt-rs's are and aim a tiny bit lower than that perhaps? you should defintely do the split dumps/fronts (trust ones i think are the bee's knee's) and ensure a big exhaust from the cats back

already have hks split dumps, and hks tuned length front pipes, and 3.5inch cat back

thanks for the feedback :sleep:

Its GT-RS... and i remember you saying a while back you refused to pay the HKS pricetag... so...

Not sure how your gonna get yourself outta that McPickle.

I got ya on that one ;)

But yeah, its GT-RS's for you Shane. There really isnt an option.

Even with a 26/30, over 500rwkw is not going to be your friend for hillclimbs ;)

Track, it should be alright, but you've still got another 20k to spend on brakes and suspension to get the power to the ground :laugh:

Your basically trying to do what the Racepace GTR has done IMO, and that is a 6 figure car

hahah i know, and i still havnt changed my mind, its just easier to say hks gt-rs instead of the garrett spiel :)

So then the t618z arent in the same game as the gt-rs? i saw a dyno graph from an autobarn, showing the t618z on a built motor (more than likely stroker) with 280 10.8 cams, and made 300kw @ 4750 and 516kw @ 7500 (or near on). That's probably the figures id like, but if the gt-rs can make the same, and a bit earlier, thatd be the choice. what do you think?

All of this work so far has been out of my own pocket, so i'll be needing to source some form of 'sponsorship' down the track, for when the really expensive stuff breaks :P

mambastu Collaborator

mambastu

Posted
Posted (edited)
already have hks split dumps, and hks tuned length front pipes, and 3.5inch cat back

thanks for the feedback ;)

hahah i know, and i still havnt changed my mind, its just easier to say hks gt-rs instead of the garrett spiel :)

So then the t618z arent in the same game as the gt-rs? i saw a dyno graph from an autobarn, showing the t618z on a built motor (more than likely stroker) with 280 10.8 cams, and made 300kw @ 4750 and 516kw @ 7500 (or near on). That's probably the figures id like, but if the gt-rs can make the same, and a bit earlier, thatd be the choice. what do you think?

All of this work so far has been out of my own pocket, so i'll be needing to source some form of 'sponsorship' down the track, for when the really expensive stuff brakes :P

Have you thought about Garrett 2860R -10's (707160-10) ? Spec-wise they appear to be very similar to the GT-RS's.

http://homepage.ntlworld.com/tbroom/Turbos.htm

Edited by mambastu
shanef Grand Master

shanef

Posted
  • Author
Posted
Have you thought about Garrett 2860R -10's (707160-10) ? Spec-wise they appear to be very similar to the GT-RS's.

http://homepage.ntlworld.com/tbroom/Turbos.htm

thanks for the link, great site! yep they are the ones id be going if i were to go the 'gt-rs' route.

Heres that dyno graph i mentioned earlier

post-20917-1167948005.jpg

paulr33 Grand Master

paulr33

Posted
Posted

have you thought about things like brakes, suspension, diff, gearbox, transfer case, etc etc all the drivetrain parts? as running 500awkw on stock gtr running gear thats 16 years old is a bit of a concern.

blk180 Veteran

blk180

Posted
Posted

You need bridged mainfolds for those size low mounts. Dirtgarge had or have GT-RS

http://www.skylinesaustralia.com/forums/in...howtopic=148285

If that is a graph of there car they had GT-RS turbos last time i heard.

BU5TER Grand Master

BU5TER

Posted
Posted
You need bridged mainfolds for those size low mounts. Dirtgarge had or have GT-RS

http://www.skylinesaustralia.com/forums/in...howtopic=148285

If that is a graph of there car they had GT-RS turbos last time i heard.

Sorry mate but I don't think thats Paul and Staceys graph

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